1 /****************************************************************************** 2 * 3 * Module Name: aslpredef - support for ACPI predefined names 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #define ACPI_CREATE_PREDEFINED_TABLE 153 #define ACPI_CREATE_RESOURCE_TABLE 154 155 #include "aslcompiler.h" 156 #include "aslcompiler.y.h" 157 #include "acpredef.h" 158 #include "acnamesp.h" 159 160 161 #define _COMPONENT ACPI_COMPILER 162 ACPI_MODULE_NAME ("aslpredef") 163 164 165 /* Local prototypes */ 166 167 static void 168 ApCheckForUnexpectedReturnValue ( 169 ACPI_PARSE_OBJECT *Op, 170 ASL_METHOD_INFO *MethodInfo); 171 172 static UINT32 173 ApCheckForSpecialName ( 174 ACPI_PARSE_OBJECT *Op, 175 char *Name); 176 177 178 /******************************************************************************* 179 * 180 * FUNCTION: ApCheckForPredefinedMethod 181 * 182 * PARAMETERS: Op - A parse node of type "METHOD". 183 * MethodInfo - Saved info about this method 184 * 185 * RETURN: None 186 * 187 * DESCRIPTION: If method is a predefined name, check that the number of 188 * arguments and the return type (returns a value or not) 189 * is correct. 190 * 191 ******************************************************************************/ 192 193 BOOLEAN 194 ApCheckForPredefinedMethod ( 195 ACPI_PARSE_OBJECT *Op, 196 ASL_METHOD_INFO *MethodInfo) 197 { 198 UINT32 Index; 199 UINT32 RequiredArgCount; 200 const ACPI_PREDEFINED_INFO *ThisName; 201 202 203 /* Check for a match against the predefined name list */ 204 205 Index = ApCheckForPredefinedName (Op, Op->Asl.NameSeg); 206 207 switch (Index) 208 { 209 case ACPI_NOT_RESERVED_NAME: /* No underscore or _Txx or _xxx name not matched */ 210 case ACPI_PREDEFINED_NAME: /* Resource Name or reserved scope name */ 211 case ACPI_COMPILER_RESERVED_NAME: /* A _Txx that was not emitted by compiler */ 212 213 /* Just return, nothing to do */ 214 return (FALSE); 215 216 217 case ACPI_EVENT_RESERVED_NAME: /* _Lxx/_Exx/_Wxx/_Qxx methods */ 218 219 Gbl_ReservedMethods++; 220 221 /* NumArguments must be zero for all _Lxx/_Exx/_Wxx/_Qxx methods */ 222 223 if (MethodInfo->NumArguments != 0) 224 { 225 sprintf (MsgBuffer, "%s requires %u", Op->Asl.ExternalName, 0); 226 227 AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_HI, Op, 228 MsgBuffer); 229 } 230 break; 231 232 233 default: 234 /* 235 * Matched a predefined method name - validate the ASL-defined 236 * argument count against the ACPI specification. 237 * 238 * Some methods are allowed to have a "minimum" number of args 239 * (_SCP) because their definition in ACPI has changed over time. 240 */ 241 Gbl_ReservedMethods++; 242 ThisName = &AcpiGbl_PredefinedMethods[Index]; 243 RequiredArgCount = METHOD_GET_ARG_COUNT (ThisName->Info.ArgumentList); 244 245 if (MethodInfo->NumArguments != RequiredArgCount) 246 { 247 sprintf (MsgBuffer, "%4.4s requires %u", 248 ThisName->Info.Name, RequiredArgCount); 249 250 if (MethodInfo->NumArguments < RequiredArgCount) 251 { 252 AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_LO, Op, 253 MsgBuffer); 254 } 255 else if ((MethodInfo->NumArguments > RequiredArgCount) && 256 !(ThisName->Info.ArgumentList & ARG_COUNT_IS_MINIMUM)) 257 { 258 AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_HI, Op, 259 MsgBuffer); 260 } 261 } 262 263 /* 264 * Check if method returns no value, but the predefined name is 265 * required to return a value 266 */ 267 if (MethodInfo->NumReturnNoValue && 268 ThisName->Info.ExpectedBtypes) 269 { 270 AcpiUtGetExpectedReturnTypes (StringBuffer, 271 ThisName->Info.ExpectedBtypes); 272 273 sprintf (MsgBuffer, "%s required for %4.4s", 274 StringBuffer, ThisName->Info.Name); 275 276 AslError (ASL_WARNING, ASL_MSG_RESERVED_RETURN_VALUE, Op, 277 MsgBuffer); 278 } 279 break; 280 } 281 282 return (TRUE); 283 } 284 285 286 /******************************************************************************* 287 * 288 * FUNCTION: ApCheckForUnexpectedReturnValue 289 * 290 * PARAMETERS: Op - A parse node of type "RETURN". 291 * MethodInfo - Saved info about this method 292 * 293 * RETURN: None 294 * 295 * DESCRIPTION: Check for an unexpected return value from a predefined method. 296 * Invoked for predefined methods that are defined to not return 297 * any value. If there is a return value, issue a remark, since 298 * the ASL writer may be confused as to the method definition 299 * and/or functionality. 300 * 301 * Note: We ignore all return values of "Zero", since this is what a standalone 302 * Return() statement will always generate -- so we ignore it here -- 303 * i.e., there is no difference between Return() and Return(Zero). 304 * Also, a null Return() will be disassembled to return(Zero) -- so, we 305 * don't want to generate extraneous remarks/warnings for a disassembled 306 * ASL file. 307 * 308 ******************************************************************************/ 309 310 static void 311 ApCheckForUnexpectedReturnValue ( 312 ACPI_PARSE_OBJECT *Op, 313 ASL_METHOD_INFO *MethodInfo) 314 { 315 ACPI_PARSE_OBJECT *ReturnValueOp; 316 317 318 /* Ignore Return() and Return(Zero) (they are the same) */ 319 320 ReturnValueOp = Op->Asl.Child; 321 if (ReturnValueOp->Asl.ParseOpcode == PARSEOP_ZERO) 322 { 323 return; 324 } 325 326 /* We have a valid return value, but the reserved name did not expect it */ 327 328 AslError (ASL_WARNING, ASL_MSG_RESERVED_NO_RETURN_VAL, 329 Op, MethodInfo->Op->Asl.ExternalName); 330 } 331 332 333 /******************************************************************************* 334 * 335 * FUNCTION: ApCheckPredefinedReturnValue 336 * 337 * PARAMETERS: Op - A parse node of type "RETURN". 338 * MethodInfo - Saved info about this method 339 * 340 * RETURN: None 341 * 342 * DESCRIPTION: If method is a predefined name, attempt to validate the return 343 * value. Only "static" types can be validated - a simple return 344 * of an integer/string/buffer/package or a named reference to 345 * a static object. Values such as a Localx or Argx or a control 346 * method invocation are not checked. Issue a warning if there is 347 * a valid return value, but the reserved method defines no 348 * return value. 349 * 350 ******************************************************************************/ 351 352 void 353 ApCheckPredefinedReturnValue ( 354 ACPI_PARSE_OBJECT *Op, 355 ASL_METHOD_INFO *MethodInfo) 356 { 357 UINT32 Index; 358 ACPI_PARSE_OBJECT *ReturnValueOp; 359 const ACPI_PREDEFINED_INFO *ThisName; 360 361 362 /* 363 * Check parent method for a match against the predefined name list. 364 * 365 * Note: Disable compiler errors/warnings because any errors will be 366 * caught when analyzing the parent method. Eliminates duplicate errors. 367 */ 368 Gbl_AllExceptionsDisabled = TRUE; 369 Index = ApCheckForPredefinedName (MethodInfo->Op, 370 MethodInfo->Op->Asl.NameSeg); 371 Gbl_AllExceptionsDisabled = FALSE; 372 373 switch (Index) 374 { 375 case ACPI_EVENT_RESERVED_NAME: /* _Lxx/_Exx/_Wxx/_Qxx methods */ 376 377 /* No return value expected, warn if there is one */ 378 379 ApCheckForUnexpectedReturnValue (Op, MethodInfo); 380 return; 381 382 case ACPI_NOT_RESERVED_NAME: /* No underscore or _Txx or _xxx name not matched */ 383 case ACPI_PREDEFINED_NAME: /* Resource Name or reserved scope name */ 384 case ACPI_COMPILER_RESERVED_NAME: /* A _Txx that was not emitted by compiler */ 385 386 /* Just return, nothing to do */ 387 return; 388 389 default: /* A standard predefined ACPI name */ 390 391 ThisName = &AcpiGbl_PredefinedMethods[Index]; 392 if (!ThisName->Info.ExpectedBtypes) 393 { 394 /* No return value expected, warn if there is one */ 395 396 ApCheckForUnexpectedReturnValue (Op, MethodInfo); 397 return; 398 } 399 400 /* Get the object returned, it is the next argument */ 401 402 ReturnValueOp = Op->Asl.Child; 403 switch (ReturnValueOp->Asl.ParseOpcode) 404 { 405 case PARSEOP_ZERO: 406 case PARSEOP_ONE: 407 case PARSEOP_ONES: 408 case PARSEOP_INTEGER: 409 case PARSEOP_STRING_LITERAL: 410 case PARSEOP_BUFFER: 411 case PARSEOP_PACKAGE: 412 413 /* Static data return object - check against expected type */ 414 415 ApCheckObjectType (ThisName->Info.Name, ReturnValueOp, 416 ThisName->Info.ExpectedBtypes, ACPI_NOT_PACKAGE_ELEMENT); 417 418 /* For packages, check the individual package elements */ 419 420 if (ReturnValueOp->Asl.ParseOpcode == PARSEOP_PACKAGE) 421 { 422 ApCheckPackage (ReturnValueOp, ThisName); 423 } 424 break; 425 426 default: 427 /* 428 * All other ops are very difficult or impossible to typecheck at 429 * compile time. These include all Localx, Argx, and method 430 * invocations. Also, NAMESEG and NAMESTRING because the type of 431 * any named object can be changed at runtime (for example, 432 * CopyObject will change the type of the target object.) 433 */ 434 break; 435 } 436 } 437 } 438 439 440 /******************************************************************************* 441 * 442 * FUNCTION: ApCheckForPredefinedObject 443 * 444 * PARAMETERS: Op - A parse node 445 * Name - The ACPI name to be checked 446 * 447 * RETURN: None 448 * 449 * DESCRIPTION: Check for a predefined name for a static object (created via 450 * the ASL Name operator). If it is a predefined ACPI name, ensure 451 * that the name does not require any arguments (which would 452 * require a control method implemenation of the name), and that 453 * the type of the object is one of the expected types for the 454 * predefined name. 455 * 456 ******************************************************************************/ 457 458 void 459 ApCheckForPredefinedObject ( 460 ACPI_PARSE_OBJECT *Op, 461 char *Name) 462 { 463 UINT32 Index; 464 ACPI_PARSE_OBJECT *ObjectOp; 465 const ACPI_PREDEFINED_INFO *ThisName; 466 467 468 /* 469 * Check for a real predefined name -- not a resource descriptor name 470 * or a predefined scope name 471 */ 472 Index = ApCheckForPredefinedName (Op, Name); 473 474 switch (Index) 475 { 476 case ACPI_NOT_RESERVED_NAME: /* No underscore or _Txx or _xxx name not matched */ 477 case ACPI_PREDEFINED_NAME: /* Resource Name or reserved scope name */ 478 case ACPI_COMPILER_RESERVED_NAME: /* A _Txx that was not emitted by compiler */ 479 480 /* Nothing to do */ 481 return; 482 483 case ACPI_EVENT_RESERVED_NAME: /* _Lxx/_Exx/_Wxx/_Qxx methods */ 484 485 /* 486 * These names must be control methods, by definition in ACPI spec. 487 * Also because they are defined to return no value. None of them 488 * require any arguments. 489 */ 490 AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op, 491 "with zero arguments"); 492 return; 493 494 default: 495 496 break; 497 } 498 499 /* A standard predefined ACPI name */ 500 501 /* 502 * If this predefined name requires input arguments, then 503 * it must be implemented as a control method 504 */ 505 ThisName = &AcpiGbl_PredefinedMethods[Index]; 506 if (METHOD_GET_ARG_COUNT (ThisName->Info.ArgumentList) > 0) 507 { 508 AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op, 509 "with arguments"); 510 return; 511 } 512 513 /* 514 * If no return value is expected from this predefined name, then 515 * it follows that it must be implemented as a control method 516 * (with zero args, because the args > 0 case was handled above) 517 * Examples are: _DIS, _INI, _IRC, _OFF, _ON, _PSx 518 */ 519 if (!ThisName->Info.ExpectedBtypes) 520 { 521 AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op, 522 "with zero arguments"); 523 return; 524 } 525 526 /* Typecheck the actual object, it is the next argument */ 527 528 ObjectOp = Op->Asl.Child->Asl.Next; 529 ApCheckObjectType (ThisName->Info.Name, Op->Asl.Child->Asl.Next, 530 ThisName->Info.ExpectedBtypes, ACPI_NOT_PACKAGE_ELEMENT); 531 532 /* For packages, check the individual package elements */ 533 534 if (ObjectOp->Asl.ParseOpcode == PARSEOP_PACKAGE) 535 { 536 ApCheckPackage (ObjectOp, ThisName); 537 } 538 } 539 540 541 /******************************************************************************* 542 * 543 * FUNCTION: ApCheckForPredefinedName 544 * 545 * PARAMETERS: Op - A parse node 546 * Name - NameSeg to check 547 * 548 * RETURN: None 549 * 550 * DESCRIPTION: Check a NameSeg against the reserved list. 551 * 552 ******************************************************************************/ 553 554 UINT32 555 ApCheckForPredefinedName ( 556 ACPI_PARSE_OBJECT *Op, 557 char *Name) 558 { 559 UINT32 i; 560 const ACPI_PREDEFINED_INFO *ThisName; 561 562 563 if (Name[0] == 0) 564 { 565 AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, Op, 566 "zero length name found"); 567 } 568 569 /* All reserved names are prefixed with a single underscore */ 570 571 if (Name[0] != '_') 572 { 573 return (ACPI_NOT_RESERVED_NAME); 574 } 575 576 /* Check for a standard predefined method name */ 577 578 ThisName = AcpiGbl_PredefinedMethods; 579 for (i = 0; ThisName->Info.Name[0]; i++) 580 { 581 if (ACPI_COMPARE_NAME (Name, ThisName->Info.Name)) 582 { 583 /* Return index into predefined array */ 584 return (i); 585 } 586 587 ThisName++; /* Does not account for extra package data, but is OK */ 588 } 589 590 /* Check for resource names and predefined scope names */ 591 592 ThisName = AcpiGbl_ResourceNames; 593 while (ThisName->Info.Name[0]) 594 { 595 if (ACPI_COMPARE_NAME (Name, ThisName->Info.Name)) 596 { 597 return (ACPI_PREDEFINED_NAME); 598 } 599 600 ThisName++; 601 } 602 603 ThisName = AcpiGbl_ScopeNames; 604 while (ThisName->Info.Name[0]) 605 { 606 if (ACPI_COMPARE_NAME (Name, ThisName->Info.Name)) 607 { 608 return (ACPI_PREDEFINED_NAME); 609 } 610 611 ThisName++; 612 } 613 614 /* Check for _Lxx/_Exx/_Wxx/_Qxx/_T_x. Warning if unknown predefined name */ 615 616 return (ApCheckForSpecialName (Op, Name)); 617 } 618 619 620 /******************************************************************************* 621 * 622 * FUNCTION: ApCheckForSpecialName 623 * 624 * PARAMETERS: Op - A parse node 625 * Name - NameSeg to check 626 * 627 * RETURN: None 628 * 629 * DESCRIPTION: Check for the "special" predefined names - 630 * _Lxx, _Exx, _Qxx, _Wxx, and _T_x 631 * 632 ******************************************************************************/ 633 634 static UINT32 635 ApCheckForSpecialName ( 636 ACPI_PARSE_OBJECT *Op, 637 char *Name) 638 { 639 640 /* 641 * Check for the "special" predefined names. We already know that the 642 * first character is an underscore. 643 * GPE: _Lxx 644 * GPE: _Exx 645 * GPE: _Wxx 646 * EC: _Qxx 647 */ 648 if ((Name[1] == 'L') || 649 (Name[1] == 'E') || 650 (Name[1] == 'W') || 651 (Name[1] == 'Q')) 652 { 653 /* The next two characters must be hex digits */ 654 655 if ((isxdigit ((int) Name[2])) && 656 (isxdigit ((int) Name[3]))) 657 { 658 return (ACPI_EVENT_RESERVED_NAME); 659 } 660 } 661 662 /* Check for the names reserved for the compiler itself: _T_x */ 663 664 else if ((Op->Asl.ExternalName[1] == 'T') && 665 (Op->Asl.ExternalName[2] == '_')) 666 { 667 /* Ignore if actually emitted by the compiler */ 668 669 if (Op->Asl.CompileFlags & OP_COMPILER_EMITTED) 670 { 671 return (ACPI_NOT_RESERVED_NAME); 672 } 673 674 /* 675 * Was not actually emitted by the compiler. This is a special case, 676 * however. If the ASL code being compiled was the result of a 677 * dissasembly, it may possibly contain valid compiler-emitted names 678 * of the form "_T_x". We don't want to issue an error or even a 679 * warning and force the user to manually change the names. So, we 680 * will issue a remark instead. 681 */ 682 AslError (ASL_REMARK, ASL_MSG_COMPILER_RESERVED, 683 Op, Op->Asl.ExternalName); 684 return (ACPI_COMPILER_RESERVED_NAME); 685 } 686 687 /* 688 * The name didn't match any of the known predefined names. Flag it as a 689 * warning, since the entire namespace starting with an underscore is 690 * reserved by the ACPI spec. 691 */ 692 AslError (ASL_WARNING, ASL_MSG_UNKNOWN_RESERVED_NAME, 693 Op, Op->Asl.ExternalName); 694 695 return (ACPI_NOT_RESERVED_NAME); 696 } 697 698 699 /******************************************************************************* 700 * 701 * FUNCTION: ApCheckObjectType 702 * 703 * PARAMETERS: PredefinedName - Name of the predefined object we are checking 704 * Op - Current parse node 705 * ExpectedBtypes - Bitmap of expected return type(s) 706 * PackageIndex - Index of object within parent package (if 707 * applicable - ACPI_NOT_PACKAGE_ELEMENT 708 * otherwise) 709 * 710 * RETURN: None 711 * 712 * DESCRIPTION: Check if the object type is one of the types that is expected 713 * by the predefined name. Only a limited number of object types 714 * can be returned by the predefined names. 715 * 716 ******************************************************************************/ 717 718 ACPI_STATUS 719 ApCheckObjectType ( 720 const char *PredefinedName, 721 ACPI_PARSE_OBJECT *Op, 722 UINT32 ExpectedBtypes, 723 UINT32 PackageIndex) 724 { 725 UINT32 ReturnBtype; 726 char *TypeName; 727 728 729 if (!Op) 730 { 731 return (AE_TYPE); 732 } 733 734 /* Map the parse opcode to a bitmapped return type (RTYPE) */ 735 736 switch (Op->Asl.ParseOpcode) 737 { 738 case PARSEOP_ZERO: 739 case PARSEOP_ONE: 740 case PARSEOP_ONES: 741 case PARSEOP_INTEGER: 742 743 ReturnBtype = ACPI_RTYPE_INTEGER; 744 TypeName = "Integer"; 745 break; 746 747 case PARSEOP_STRING_LITERAL: 748 749 ReturnBtype = ACPI_RTYPE_STRING; 750 TypeName = "String"; 751 break; 752 753 case PARSEOP_BUFFER: 754 755 ReturnBtype = ACPI_RTYPE_BUFFER; 756 TypeName = "Buffer"; 757 break; 758 759 case PARSEOP_PACKAGE: 760 case PARSEOP_VAR_PACKAGE: 761 762 ReturnBtype = ACPI_RTYPE_PACKAGE; 763 TypeName = "Package"; 764 break; 765 766 case PARSEOP_NAMESEG: 767 case PARSEOP_NAMESTRING: 768 /* 769 * Ignore any named references within a package object. 770 * 771 * For Package objects, references are allowed instead of any of the 772 * standard data types (Integer/String/Buffer/Package). These 773 * references are resolved at runtime. NAMESEG and NAMESTRING are 774 * impossible to typecheck at compile time because the type of 775 * any named object can be changed at runtime (for example, 776 * CopyObject will change the type of the target object). 777 */ 778 if (PackageIndex != ACPI_NOT_PACKAGE_ELEMENT) 779 { 780 return (AE_OK); 781 } 782 783 ReturnBtype = ACPI_RTYPE_REFERENCE; 784 TypeName = "Reference"; 785 break; 786 787 default: 788 789 /* Not one of the supported object types */ 790 791 TypeName = UtGetOpName (Op->Asl.ParseOpcode); 792 goto TypeErrorExit; 793 } 794 795 /* Exit if the object is one of the expected types */ 796 797 if (ReturnBtype & ExpectedBtypes) 798 { 799 return (AE_OK); 800 } 801 802 803 TypeErrorExit: 804 805 /* Format the expected types and emit an error message */ 806 807 AcpiUtGetExpectedReturnTypes (StringBuffer, ExpectedBtypes); 808 809 if (PackageIndex == ACPI_NOT_PACKAGE_ELEMENT) 810 { 811 sprintf (MsgBuffer, "%4.4s: found %s, %s required", 812 PredefinedName, TypeName, StringBuffer); 813 } 814 else 815 { 816 sprintf (MsgBuffer, "%4.4s: found %s at index %u, %s required", 817 PredefinedName, TypeName, PackageIndex, StringBuffer); 818 } 819 820 AslError (ASL_ERROR, ASL_MSG_RESERVED_OPERAND_TYPE, Op, MsgBuffer); 821 return (AE_TYPE); 822 } 823 824 825 /******************************************************************************* 826 * 827 * FUNCTION: ApDisplayReservedNames 828 * 829 * PARAMETERS: None 830 * 831 * RETURN: None 832 * 833 * DESCRIPTION: Dump information about the ACPI predefined names and predefined 834 * resource descriptor names. 835 * 836 ******************************************************************************/ 837 838 void 839 ApDisplayReservedNames ( 840 void) 841 { 842 const ACPI_PREDEFINED_INFO *ThisName; 843 UINT32 Count; 844 UINT32 NumTypes; 845 846 847 /* 848 * Predefined names/methods 849 */ 850 printf ("\nPredefined Name Information\n\n"); 851 852 Count = 0; 853 ThisName = AcpiGbl_PredefinedMethods; 854 while (ThisName->Info.Name[0]) 855 { 856 AcpiUtDisplayPredefinedMethod (MsgBuffer, ThisName, FALSE); 857 Count++; 858 ThisName = AcpiUtGetNextPredefinedMethod (ThisName); 859 } 860 861 printf ("%u Predefined Names are recognized\n", Count); 862 863 /* 864 * Resource Descriptor names 865 */ 866 printf ("\nPredefined Names for Resource Descriptor Fields\n\n"); 867 868 Count = 0; 869 ThisName = AcpiGbl_ResourceNames; 870 while (ThisName->Info.Name[0]) 871 { 872 NumTypes = AcpiUtGetResourceBitWidth (MsgBuffer, 873 ThisName->Info.ArgumentList); 874 875 printf ("%4.4s Field is %s bits wide%s\n", 876 ThisName->Info.Name, MsgBuffer, 877 (NumTypes > 1) ? " (depending on descriptor type)" : ""); 878 879 Count++; 880 ThisName++; 881 } 882 883 printf ("%u Resource Descriptor Field Names are recognized\n", Count); 884 885 /* 886 * Predefined scope names 887 */ 888 printf ("\nPredefined Scope/Device Names (automatically created at root)\n\n"); 889 890 ThisName = AcpiGbl_ScopeNames; 891 while (ThisName->Info.Name[0]) 892 { 893 printf ("%4.4s Scope/Device\n", ThisName->Info.Name); 894 ThisName++; 895 } 896 } 897